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Optical hydrogen sensing properties of nanostructured Pd/MoO3 films.


Yaacob, Mohd. Hanif and Yu, J. and Latham, K. and Kalantar-Zadeh, K. and Wlodarski, W. (2011) Optical hydrogen sensing properties of nanostructured Pd/MoO3 films. Sensor Letters, 9 (1). pp. 16-20. ISSN 1546-198X; ESSN:1546-1971


In this work, molybdenum trioxide (MoO3) nanostructured films were deposited onto quartz substrates via thermal evaporation of MoO3 powder. Subsequently, a catalytic palladium (Pd) layer was deposited onto MoO3 layer by e-beam evaporation. Scanning electron microscopy (SEM) revealed MoO3 nanorods grown in various directions and X-ray diffraction (XRD) confirmed the growth of orthorhombic MoO3. Optical hydrogen (H2) sensing performance of nanostructured Pd/MoO3 films were investigated at a concentration between 0.06-1%. It was observed that the nanostructured films exhibited excellent gasochromic characteristics and remarkable absorbance changes in near infrared (NIR) wavelength range (750-1000 nm) when exposed to H2. Pd/MoO3 T90% response and recovery towards 0.06% H2 were 150 and 300 s, respectively. The film operating temperature was also found as low as 120 °C.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1166/sl.2011.1410
Publisher: American Scientific Publishers
Keywords: Pd/MoO3 Nanostructures; Optical hydrogen sensing; Thermal evaporation.
Depositing User: Nur Farahin Ramli
Date Deposited: 24 Dec 2013 08:18
Last Modified: 28 Oct 2015 04:35
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1166/sl.2011.1410
URI: http://psasir.upm.edu.my/id/eprint/23495
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